Apple Stock: Among The Nutty Theories, A Legitimate Worry

Any tech investor can name lots of reasons for the repeated sell-offs in Apple (AAPL) shares lately, and to some extent, they’re probably right about all of them. But when you cut out the hysteria and look at the real numbers at hand, the most reasonable worry boils down to this: that Apple’s profit margins will shrink substantially, even if its products remain top dogs in its markets.